Science Channel HD

New evidence suggests the Maya civilization did not suddenly vanish, but instead, that they survived and resettled in the United States; experts use cutting-edge tech to reveal what really happened to these long-lost people.

New evidence from one of the world's oldest maps offers clues to a long-lost civilization of untold treasure, and this cutting-edge expedition might finally prove that this mysterious kingdom is the ancestral home of the ancient Egyptians.

When satellites spot a mysterious structure in North Korea, experts investigate if this sinister evidence points to a looming nuclear threat, and using cutting-edge tech, they reveal dark secrets from this strange place.

When a strange pattern appears in a field, experts wonder if its an extraterrestrial response to a message sent to an alien star cluster in 1974, and using cutting-edge science, they uncover its true origin.

A strange circular forest next to a notorious cannibal site; when an eerie crater is spotted in Siberia, experts uncover if it could be evidence of Nikola Tesla's doomsday device; cutting-edge tech helps experts answer these sinister mysteries.

An abandoned ghost town in a remote desert with a dark past; when a strange facility is spotted in Russia, experts investigate if it's hiding evidence of alien life; cutting-edge tech reveals new clues to these sinister mysteries from space.

Evidence of a mysterious 5,000-year-old structure suddenly appears in Ireland. A top-secret machine that can see back in time. A satanic pentagram in the snow that points to witchcraft in the New World.

A site that could be the Garden of Eden hides a deadly secret; when a gateway to hell suddenly opens, experts investigate where it leads; a mysterious shipwreck could be an infamous Soviet KGB pirate ship.

An abandoned ghost town in a remote desert with a dark past; when a strange facility is spotted in Russia, experts investigate if it's hiding evidence of alien life; cutting-edge tech reveals new clues to these sinister mysteries from space.

Evidence of a mysterious 5,000-year-old structure suddenly appears in Ireland. A top-secret machine that can see back in time. A satanic pentagram in the snow that points to witchcraft in the New World.

A site that could be the Garden of Eden hides a deadly secret; when a gateway to hell suddenly opens, experts investigate where it leads; a mysterious shipwreck could be an infamous Soviet KGB pirate ship.

A strange circular forest next to a notorious cannibal site; when an eerie crater is spotted in Siberia, experts uncover if it could be evidence of Nikola Tesla's doomsday device; cutting-edge tech helps experts answer these sinister mysteries.

New evidence suggests the Maya civilization did not suddenly vanish, but instead, that they survived and resettled in the United States; experts use cutting-edge tech to reveal what really happened to these long-lost people.

New evidence from one of the world's oldest maps offers clues to a long-lost civilization of untold treasure, and this cutting-edge expedition might finally prove that this mysterious kingdom is the ancestral home of the ancient Egyptians.

The legends of robot combat put it all on the line for a shot at the 2018 World Championship.

Fan favorites Yeti and Witch Doctor face off in a world-class fight as top competitors battle to earn their spots in the postseason tournament.

Legends Hypershock and Biteforce face off in an epic showdown, while up-and-comers try to prove they have what it takes to be crowned 2018 BattleBots World Champion.

Reigning champion Tombstone takes on the legendary Gigabyte as the battles heat up to take home the renowned BattleBots trophy.

A brutal match-up between Icewave and Yeti ignites the Battlebox, while the best bots in the world flex their gears.

Experts use a cutting-edge, all-terrain engineering marvel to access a perilous job site covered in snow.

The world's only actual all-terrain vehicle is an arctic mega monster that can conquer land, snow and water; a machine that can climb mountains.

Tourists explore the far reaches of northern Canada and gain exclusive access to polar bears on custom-built rovers; the Twin Otter aircraft drops much-needed supplies to isolated villages.

When melting ice threatens to flood a town, a 22-ton amphibious mega machine battles the elements to save the day; in the Arctic, the Canadian Air Force relies on a massive transport aircraft to deliver supplies and personnel to far-off places.

The Yeti is a custom-made snow-eater that keeps a critical Alaskan airport open for business; experts reveal how cutting-edge engineering and the latest technology keep this machine running in the toughest conditions.

An unidentified metal object is found on Kiska Island; a centuries-old gold mining mystery is investigated; in Siberia, a network of ice tunnels is explored; fossils unearthed in the Canadian Arctic lead to the discovery of a new species.

Climbers make a shocking discovery when they encounter the remains of two human bodies high atop New Zealand's Mount Cook; after a forensic investigation, a decades-old mystery reignites that could rewrite mountaineering history.

Archaeologists discover human remains during an excavation of a fifth-century fort on the Swedish island of Oland; after further investigation, experts unearth 26 skeletons and uncover the site of an ancient massacre.

A new theory about the sinking of the Titanic emerges; a treeless circle in the middle of the woods is probed; a formation of giant whale bones is discovered sticking out of the ground; researchers study the loudest sound ever recorded underwater.

Archaeologists discover an unusual man-made rock formation in the remote Altai Mountains of Russia, and conducting a further excavation, they unearth an ancient log cabin and the mummified remains of two bodies buried deep in the frozen permafrost.

Archaeologists make a grim discovery when they uncover the remains of a mummified boy buried in the frozen Siberian landscape, and as researchers continue their excavation, they uncover 88 additional graves linked to a mysterious, ancient necropolis.

Intrepid archaeologists make groundbreaking discoveries as they work to unravel the mysteries of an Ice Age highway, challenging everything previously thought about prehistoric humans and how they came to the Americas.

Archaeologists make a grim discovery when they uncover the remains of a mummified boy buried in the frozen Siberian landscape, and as researchers continue their excavation, they uncover 88 additional graves linked to a mysterious, ancient necropolis.

Intrepid archaeologists make groundbreaking discoveries as they work to unravel the mysteries of an Ice Age highway, challenging everything previously thought about prehistoric humans and how they came to the Americas.

Archaeologists discover an unusual man-made rock formation in the remote Altai Mountains of Russia, and conducting a further excavation, they unearth an ancient log cabin and the mummified remains of two bodies buried deep in the frozen permafrost.

An unidentified metal object is found on Kiska Island; a centuries-old gold mining mystery is investigated; in Siberia, a network of ice tunnels is explored; fossils unearthed in the Canadian Arctic lead to the discovery of a new species.

Climbers make a shocking discovery when they encounter the remains of two human bodies high atop New Zealand's Mount Cook; after a forensic investigation, a decades-old mystery reignites that could rewrite mountaineering history.

World-class robots Bronco and Bombshell go head-to-head as the elite group of robots compete for the title of 2018 BattleBots World Champion.

Rookie bot End Game and former BattleBots champ Bite Force duke it out in an action-packed night of battles.

BattleBots royalty Bronco and Lock-Jaw fight to the death as the competition for 2018 BattleBots World Champion gets fierce.

An insight into the production processes for cast iron stoves, ultralight aircraft, snow groomers and rubber bands.

More everyday items are put under the microscope as we discover how barber chairs, sewage pumps, bimini boat tops and diesel filters are made.

An insight and expert analysis into the production process for car tires, silk, art conservation and scuba tanks.

Examine how electric stand-up vehicles, frozen fruit, beer coasters and forged door handles are manufactured.

Precast concrete walls; 3D printers; telescopic cranes; kerosene lamp burners.

Examining how items such as car headlamps, directional drills, and combs are made and how stained glass is restored.

Handcrafted skis; septic tanks; hydro-formed chassis parts; aquarium windows.

Zip line brakes; silk fiber lamps; round balers; comfort shoes.

Old West holsters; camera housings; soy beverages; pet nail trimmers.

Wood garage doors; salt spreaders; animatronic dinosaurs.

Decorative sombreros; salad dressings; cap guns, regenerative medicine.

How cheese graters, hot sauce, silver jewelry and traditional Mexican chairs are made.

In 373 B.C., the Greek city of Helike vanished; archaeologists believe they've found the ruins of the great lost metropolis; using CGI, experts re-create the city's final moments and reveal its links to the greatest lost land of all -- Atlantis.

Hadrian's Villa is the largest Roman palace ever constructed and demonstrates the opulent peak of Rome's ancient engineering; experts investigate secrets that could reveal the truth behind one of Rome's most enigmatic emperors.

The Avenue of the Sphinxes has now been unearthed in the biggest excavation in Egyptian history; using cutting-edge CGI, investigators reveal the hidden secrets of the sphinxes.

The legendary city of Kish, Iraq, lies at the cradle of human civilization and home to some of the world's first kings; using cutting-edge tech, experts investigate the buried secrets of this lost city to uncover the first origins of royalty.

The lost city of Olous: A great metropolis submerged in the Mediterranean; archaeologists uncover its secrets using pioneering technology and CGI reconstruction.

Palmyra: pearl of the Syrian desert; experts return to the site and use CGI reconstruction to reveal the secrets of Palmyra's ancient engineers.

Experts use the latest forensic archaeology to investigate the true story behind the disappearance of more than 100 English colonists who settled on Roanoke Island in 1587.

Don Wildman investigates the unsolved Zodiac murders; diving headfirst into the case, he meets with a retired investigator who worked the crimes, learns code breaking from a Zodiac cryptographer, visits a DNA lab, and learns a new theory.

Experts use the latest forensic archaeology to investigate the true story behind the disappearance of more than 100 English colonists who settled on Roanoke Island in 1587.